"The Rosewill RCX-Z1 is an economical socket AM2 or 939 AMD Athlon64 heatsink in the most basic sense. In fact, it has been quite a while since FrostyTech has tested an extruded aluminum cooler for a modern processor. Apart from its copper heat spreader base plate, this is a very simple heatsink that is cheap and simple to install. It's thermal performance is satisfactory for AMD Sempron or any of the new lower wattage Athlon64 CPUs."